Battery equipped with large-pore-diameter insulating ring

Abstract

The invention relates to a battery equipped with a large-pore-diameter insulating ring. The battery is provided with a bare battery, the large-pore-diameter insulating ring for covering a sealing plate of the bare battery, and a thermal shrinkage sleeve for coating the bare battery and the insulating ring; the battery is characterized in that the insulating ring adopts a stereoscopic structure; the insulating ring is provided with a main plane and a side wall, wherein the main plane adopts a planer annular shape and is equipped with a run-through hole in the center, and the main plane covers the sealing plate of the bare battery; the pore diameter of the run-through hole is larger than the diameter of an electrode terminal on the sealing plate; and the side wall is formed by perpendicular downward extension from the external peripheral edge or internal peripheral edge of the main plane. According to the battery equipped with the large-pore-diameter insulating ring, dislocation or falling off of the large-pore-diameter insulating ring during being assembled to the bare battery or in a subsequent thermal shrinkage sleeve process can be effectively prevented, thereby ensuring the safety of the battery.

Description

technical field [0001] The present invention relates to a battery, in particular, to a battery with a large aperture insulating ring. Background technique [0002] With the popularization of electronic mobile devices in recent years, secondary batteries have been rapidly developed as their power sources. These batteries are constantly being demanded more and more in terms of high capacity and safety. [0003] A secondary battery generally includes a metal casing, a sealing plate, and a power generating element sealed in a hermetic cavity formed by the metal casing and the sealing plate. After caulking the upper end of the opening of the metal case to the sealing plate through an insulating gasket, a bare cell is formed, and a paper insulating ring is placed on the sealing plate (usually the positive end) of the bare cell to ensure the sealing plate. The positive terminal on the top is insulated from the metal casing as the negative terminal, followed by a heat shrink sleev...

AI Technical Summary

Problems solved by technology

Compared with the commonly used planar annular small-aperture insulating ring, the large-aperture insulating ring is usually 1.2 to 4 times the diameter of the electrode terminal due to its larger aperture, so the inner peripheral edge of the insulating ring is in contact with the electrode terminal (that is, forming There is a certain distance between the top cover on the sealing plate). When the insulating ring with large aperture is placed on the battery end face (ie, the sealing plate), the insulating ring is easy to move back and forth in the horizontal direction and cannot be positioned well. Therefore, it is easy to produce misalignment in the horizontal direction

Moreover, due to the small contact area between the large-aperture insulating ring and the sealing plate, it is difficult to place it on the electrode end face smoothly, and it is easy to drop

Furthermore, in the subsequent heat-shrinkable sleeve process, the large-aperture insulating ring is easily dropped from the sealing plate due to the contact of equipment parts and the like. In this case, since the large-aperture insulating ring is exposed to heat The area outside the shrink tube is small, and it is difficult to observe visually, so it is easy to miss detection

If there is a leak in the visual inspection process before the battery leaves the factory, the battery lacking the insulating ring will be mixed with the normal battery and sold, which will become a great safety hazard in use

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